package singleton;

/**
 * @author : DuJiabao
 * @Date : 2021/3/1 17:50
 * @Project : design-pattern
 * @File : null.java
 * @Desc :
 */
public enum Singleton6 {
  INSTANCE;
  public void sayOK() {
    System.out.println("ok");
  }
}
